comdlg32.dll

What is it?Windows Common Dialogs Library - comdlg32.dll

What does it do? The
Common Dialog Box Library contains a set of dialog boxes for performing
common tasks, such as opening files and printing documents. The common
dialog boxes provide a uniform user interface that lets users carry out
these common tasks without being forced to learn new techniques with
each application. Source

Virus Precautions:You'll want to keep an eye on this google search for any known viruses. The normal location of this file is C:Windowssystem32comdlg32.dll If its not running in that location you'll want to reference some virus DBs and/or scan for viruses.